I was just working on a ladder load for a 223 and thought I had enough powder to complete what I was doing but ended up short of finishing with that Lot.
Move on and open a new jar, not a problem.
As I was working this as a control I was weigh checking every drop to stay within a node. But after opening and dropping a load to restart I found my density must have changed.
The target load I had and being measured on an electronic scale was 23.76gr and it was holding consistently until the hopper got very low. After changing Lots and running thru some settling drops the new lot was dropping at 23.94gr.. So here I had the same volume of powder but the weight changed.
At this point I didn't change the measure throw to regain the set point weight I just poured of a little powder from each and then trickled up to the target weight. As at this point in the session I only had 14 more rounds to load.
I also took these last 14 and marked them to indicate the change in powder and measure.
So as the volume did not change I am assuming that the powder density changed. I understand this is common among different Lots and that density can also change in the same powder over time due to humidity changes.
Question is how much does the density need to change before there is a measurable or noticeable effect? Which would play a bigger part, keeping the weight the same or keeping the volume the same? Or does that depend on the powder?
Move on and open a new jar, not a problem.
As I was working this as a control I was weigh checking every drop to stay within a node. But after opening and dropping a load to restart I found my density must have changed.
The target load I had and being measured on an electronic scale was 23.76gr and it was holding consistently until the hopper got very low. After changing Lots and running thru some settling drops the new lot was dropping at 23.94gr.. So here I had the same volume of powder but the weight changed.
At this point I didn't change the measure throw to regain the set point weight I just poured of a little powder from each and then trickled up to the target weight. As at this point in the session I only had 14 more rounds to load.
I also took these last 14 and marked them to indicate the change in powder and measure.
So as the volume did not change I am assuming that the powder density changed. I understand this is common among different Lots and that density can also change in the same powder over time due to humidity changes.
Question is how much does the density need to change before there is a measurable or noticeable effect? Which would play a bigger part, keeping the weight the same or keeping the volume the same? Or does that depend on the powder?